Title: Studies of Star Formation with TEXES
Authors: John H. Lacy, Daniel T. Jaffe, Matthew J. Richter,
         Joan R. Najita, and John S. Carr

TEXES, a high resolution mid-infrared spectrograph,
was used by the Gemini community for 26 science nights in 2006-2007.
A major emphasis was on studies of gas in regions of high and low-mass
star formation.  The combination of TEXES' 4 km/s spectral resolution
and Gemini's diffraction-limited mid-infrared spatial resolution
and low background provided new information on the structure and
chemistry of gas surrounding newly formed stars.
Two high-mass regions were studied in some detail.
In W51, a massive precessing jet was seen emerging from a molecular
cloud into an HII region.  In NGC 7538, one of the maser peaks was
found to be the source of high velocity outflow.  The molecular 
absorption and ionic emission toward this source suggest that it
is an accreting O star.
Molecular and ionized gas was studied in disks around numerous
low-mass young stars.  Emission by H2, H2O, and [Ne II] was seen
toward several T Tauri and HAeBe stars, and absorption by C2H2, HCN,
NH3, and H2O was seen toward one.  The profiles of these emission and
absorption lines provide information on the spatial distribution
of molecular species in protoplanetary disks.